\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Partisan Polarization over Redistribution and Fixed Attributes \label {TabWithinER}}
\begin{tabular}{l*{2}{c}}
\hline\hline
                &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}\\
                &\multicolumn{1}{c}{Redistribution}&\multicolumn{1}{c}{Fixed Values}\\
\hline
High LMP period & -3.3e+03         &  1.1e+04\sym{***}\\
                &(1.3e+04)         &(3248.358)         \\
Control variables &      Yes         &      Yes         \\
LDV             &      Yes         &      Yes         \\
\hline
Observations    &      180         &      180         \\
R$^2$           &    0.326         &    0.295         \\
AIC             & 4589.552         & 4358.513         \\
\hline\hline
\multicolumn{3}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{3}{l}{\footnotesize \sym{*} \(p<0.1\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular}
\end{table}
